A Londonderry woman is dead after a snowmobile accident in Pembroke Saturday.

New Hampshire Fish and Game officers said Deirdre Ruth Dunlea, 58, was riding a snowmobile with her husband and son near North Pembroke Road when she crashed around 2:40 p.m.

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The woman was riding through a wooded area when she miscalculated a left turn and crashed into a eight-inch pine tree off the right side of Corridor Trail 15 N, according to fish and game.

Conservation officers said they tried resuscitating Dunlea at the scene, but she never gained consciousness and died. Dunlea was wearing a full-face helmet at the time of the crash, according to fish and game.

“This is a really tragic incident. This woman was an experienced snowmobiler. It appears she may have simply miscalculated the curve. Our thoughts are with her family,” conservation officer Lt. Jim Juneau said.

The Pembroke police and fire departments, the Epsom fire department, and a representative from the State Medical Examiner’s Office also responded.

Authorities are investigating, but do not believe excessive speed, or drug or alcohol impairment, were contributing factors in the crash.